Around 1 billion people worldwide are deficient in the nutrient. Vitamin D deficiency is more common than many people realize. Vitamin D also helps your body maintain a strong immune system, and it plays a part in regulating cell growth and communication between cells. The mineral calcium is crucial for strong, healthy bones, so without sufficient vitamin D, your bones will grow soft and weak. While it has several functions, the most important role of vitamin D is to help your body absorb calcium from food passing through your small intestine and then regulate the amount of calcium and phosphorus in your bloodstream. These vitamins are absorbed better when consumed with high-fat foods, and they are stored in the liver and fatty tissue throughout the body. Vitamin D is one of the four fat-soluble vitamins, along with vitamins A, E, and K. Another unique trait of vitamin D is that before your body can use it, it must be converted into a hormone called calcitriol or activated vitamin D. You have to consume all of the other vitamins through food or supplements your body cannot produce them on its own.

However, vitamin D is unique in that your body is able to produce it from sun exposure.

Vitamin D is one of the 13 essential vitamins. Purity Products – Is 5,000 IU of Vitamin D per Day Too Much?

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